CN101205643A - Draw-off roller for a combing machine - Google Patents

Abstract

The present invention provides detaching rollers (5a, 6a) of a carding mechine, the detaching rollers are set with pressure rollers (5d,6d), two ends of the pressure rollers athwartships to the rotating shaft of the separating roller are effected by a pressure device, characterized in that the separating rollers (5a, 6a) have column middle region, every condition of the two sides and the adjacent end is set with at least two continuous taper parts (K1, K2), the conicity of the rear taper (K2) is larger than the front taper (K1) in each condition seeing along the direction of the corresponding end of the separating rollers.

Description

The detaching roller that is used for carding machine

Technical field

The present invention relates to a kind of detaching roller of carding machine, be provided with the pressure roller on it, pressure apparatus acts on the two ends of this pressure roller transverse to the rotation of this detaching roller.

Background technology

For separating and bonding operation on carding machine, it is right to the detaching roller of back that the lap end that the combing segment combing of being combed by circle in advance is held component transfer.Described detaching roller is to being driven with pilgrim's paces formula (pilgrim-step), and the fiber sliver of Xing Chenging (abbreviating sliver as) send to feedback with specific quantity along the direction of clamp assemblies (abbreviating holder as) before.In this situation, the end (fiber fringe) that is transferred and is held the lap that the part combing goes out is placed on the end of the sliver that send to feedback with partial amt.Therefore then, the right direction of rotation of this detaching roller is reversed, and enters into the right clamping line of this detaching roller with the stacked end by the lap of combing of the end sections of this sliver.In this situation, the fiber that is held the lap end that wire clamp holds be drawn out or with the lap end separating.In order to obtain uniformly output and the conveying of fiber on the right whole width of detaching roller subsequently, the chucking power that applies in the right clamping line of detaching roller is roughly extended on the whole width of the lap end of this sliver equably.

In carding machine commonly used, the detaching roller that the quilt that two of operated by rotary motion are arranged before and after each other drives has jointly been placed the pressure roller respectively on this detaching roller.Act on by a kind of device with pressure in the zone of end of this pressure roller.Therefore, in most cases, use the Pneumatic pressure cylinder.Usually, the pressure roller is provided with softer covering (for example, rubber) and drives by the separated roller of friction.

First detaching roller that the pressure roller loads is responsible for actual lock out operation, and is responsible for reinforcing the abutment and carries this sliver by second detaching roller of the similar loading of pressure roller.Can also conceive a kind of scheme, wherein second detaching roller is to being removed.This technical scheme can for example obtain from publishing WO2006/012758.That is the detaching roller of the special shape that, requires has below also related to and only uses to have a detaching roller that has been assigned with pressure.

By the pressure of the pressure roller in the zone that is transported to its outer end, the bending slightly of pressure roller has taken place.Therefore the high acceleration that a large amount of combing circulations and the motion of pilgrim's paces formula cause because this pressure roller has been subjected to must keep their quality low as far as possible.Therefore, in principle, they have minor diameter, and this will reduce the bending strength of this pressure roller on length certainly.This bending has particularly caused the compressive load higher than zone line at the borderline region of sliver.This sliver that has caused destroying in these borderline regions forms quality.

Pressure on the width that obtains to be evenly distributed on detaching roller has proposed a plurality of technical schemes.In this situation, the great majority suggestion has related to a kind of custom-designed pressure roller.In order to consider the bending of the pressure roller of generation when exerting pressure, in DE405360, proposed to form the pressure roller by the sleeve that is installed on the mandrel.In this situation, this mandrel is tapered in the zone of two ends of sleeve with being circular cone, and therefore, the pressure that is applied on the two ends of this mandrel is transported to this sleeve with the borderline region certain distance of distance sleeve.Similarly type is illustrated among the embodiment of EP336217.File " Die Wakoflex-Walze; ein neuesWalzenkonzept " (the crooked roller of Wako from " textile praxis international1988 June/pages 654-656 ", a kind of novel roller notion) provides multiple roller system, be used on the width of roller, obtaining uniform pressure.These are the embodiment from the field of pressure treatment card clothing net (cloth webs), and employed roller is roughly long than the detaching roller of this carding machine usually.Also attempt the bending of this roller of compensation here, by the respective design of roller installing rack.

Barrel-shaped detaching roller with barrel-shaped pressure roller is illustrated among the DE644120.Be provided with sports belt around this detaching roller.Because the bucket formula of this detaching roller and pressure roller designs, cause having guaranteed the even compressive load on the width of this roller.Moreover, exist to have the experience of polytype detaching roller, in this kind detaching roller, be provided with tapered segment on each in two ends.So provide a kind of improvement, but also do not obtained the success of expectation.

Above-mentioned known solution partly has complicated special installing rack, and this installing rack cost aspect production and assembling is too high.Even roller barrel-shaped or combination is more complicated more than cylinder roller aspect production.Another problem in using this roller appears at them and must be ground once more at cotton mill.Cotton mill is not equipped special grinder usually and is made that for example barrel-shaped roller can not be ground again.

Summary of the invention

Therefore target of the present invention is to avoid the shortcoming of known type and proposed to produce the detaching roller that is used for carding machine cheaply, by this detaching roller, in each situation, cooperate the roughly uniform pressure distribution that can obtain on the length of detaching roller with the pressure roller.In the carding machine that for example has 8 combing heads, need 16 such detaching rollers.

In order to obtain this target, proposed detaching roller (in a plurality of) design the cylinder zone line has been arranged, the end adjacent with it in both sides all is provided with at least two continuous tapered segments in each situation, and as what see along the direction of the respective end of this detaching roller, the tapered segment of following in each situation has the tapering bigger than the tapered segment of front.

Best, continuous tapered segment is designed such that their continuous circumferential section extends along sweep, and this sweep calculates according to following formula:

$w\left(x\right)=\frac{{\mathrm{<figure-callout\; id="4"\; label="ql"\; filenames="S2007101993882E00021.png"\; state="\{\{state\}\}">ql</figure-callout>}}^4}{24E{I}_y}[\frac{x}{l}-2{\left(\frac{x}{l}\right)}^3+{\left(\frac{x}{l}\right)}^4].$

This formula is by reference paper " DUBBEL-Taschenbuch " (Dubbel handbook) C20 page or leaf; Springer Verlag (ISBN3-540-57650-9/ the 18th edition) obtains.Here, " w (x) is meant that along the distortion of the relative x axle of y direction this deformed shaft line parallel extends in this rotating shaft D." I " be meant the length of this roller, " q " be meant compressive load, " E " be meant modulus of elasticity (N/mm ²) and " I _y" be meant surperficial torque along the y direction.

The feasible bending that can resist the pressure roller of generation of the shape of the detaching roller of this suggestion, thus finally during separation and bonding operation, obtaining roughly load uniformly on the length of this roller.The pressure roller that uses in this situation can have cylindrical shape, therefore can easily grind at cotton mill again.

By given scheme, the pressure peak that appears in the technical scheme in front especially in the introducing zone of this pressure can alleviate, as describing in detail in the specific embodiment of back.The borderline region of this sliver can also more effectively be controlled, because they have been subjected to the effect of low compression load.

Best, proposition can have two or 6 continuous tapered segments in abutting connection with the end of the detaching roller of column part in each situation.Be adapted to introduce the position of pressure for the shape that makes this detaching roller, the length of the length of this column part greater than first adjacent with this column part in each situation tapered segment has also been proposed, below the length of another tapered segment in each situation less than the length of corresponding first tapered segment.

Best, proposition is installed in two tapered segments on this mid portion in each situation, first tapered segment in abutting connection with this column part all is provided with the tapering with angle (α) in each situation, this angle is between 0 ° 2 '-0 ° 10 ', and the angle (β) of the tapering that second tapered segment of back has is between 0 ° 12 '-0 ° 25 '.

For auxiliary this lock out operation (clamping reliably during lock out operation), also propose this detaching roller and be provided with cannelure.This cannelure extends on the column part of this detaching roller and tapered segment in this case.

Best, in this situation, this cannelure has constant length on whole parts of this detaching roller.Therefore the desirable condition of this separating force is guaranteed on the whole length of this detaching roller relatively.

This cannelure for example is angle (β) extension with the rotating shaft of relative this detaching roller in this case.

In addition, to be positioned at this pressure roller above detaching roller be cylindrical and be provided with the hardness that has less than the hardness on the surface of detaching roller in suggestion.

This has guaranteed that enough frictional force is arranged, by driven detaching roller make this pressure roller by frictional force under the effect of this sliver that is held, even rotate together with higher rotary speed.

In addition, on roller length, look, be provided with the fluctuation that can adapt to or compensate material in the sliver than the pressure roller of pressure release surface.

In addition, the pressure roller that has also proposed to be positioned on the detaching roller sees to have the shape that departs from this cylindrical shape on its length.In this case, can conceive this pressure roller and in its end regions, be provided with tapered segment similarly.Yet if possible, departing from of cylindrical shape pressure roller be avoided so that (as already described) allows easily to grind in cotton mill again relatively.

Therefore, in order to compensate the bending of this pressure roller, the pressure roller that is positioned on the detaching roller can have cylindrical sleeves, and the mid portion of this cylindrical sleeves is fastened on the mid portion of roller core.

In addition, proposed a kind ofly, any cylinder zone line wherein has not been set, in the middle of this detaching roller according to detaching roller of the present invention, be provided with a plurality of tapered segments towards two ends, the circumferential surface of described tapered segment is tapered towards the respective end portions of detaching roller.In this situation, their circumferential surface extends in a sweep that is calculated by above-mentioned formula.Therefore, the profile of this detaching roller is preferably harmonious with the bending force that occurs, so the uniform pressure distribution is obtained equally.Certainly this type can also be provided with continuous cannelure.

Another kind of pressure roller also can be contemplated, wherein in conjunction with detaching roller of the present invention, guarantee the roughly uniform pressure distribution on the length of pressure roller, in the wherein special heating state during operation, avoided the pressure peak of this sliver borderline region.

Description of drawings

Other favourable distortion of the present invention are described in detail by the specific embodiment below,

Accompanying drawing comprises:

Fig. 1 letter illustrates the side view of carding machine;

Fig. 2 shows the known detaching roller with pressure roller and pressure distribution curve;

Fig. 3 illustrates the distortion of the present invention of the detaching roller with pressure roller of being hungry, and pressure distribution curve;

Fig. 4 shows the partial view of the amplification of Fig. 3;

Fig. 4 a shows a part of view of the cross sectional view of Fig. 4;

Fig. 5 shows another embodiment of Fig. 3;

Fig. 6 shows another embodiment of the Fig. 3 with different pressures roller;

Fig. 7 shows another embodiment of Fig. 6; With

Fig. 8 shows the amplifier section view of the distortion of the present invention of detaching roller.

The specific embodiment

Fig. 1 shows prior art embodiments.In this situation, the lap sheet of being carried by clamp assemblies 1 (abbreviating holder as) 2 is supplied roller 3 and is supplied to pair of separated roller 5.Pair of separated roller 5 comprises detaching roller 5a and pressure roller 5d in this situation.The fiber fringe 7 (end of lap sheet) that this opening holder 1 from be in anterior locations stretches out is placed to fiber sliver 10 or by on the rear end 8 of the sliver of combing and be transported to detaching roller therewith in 5 the jaw, and this is to 5 travel forward and cause by detaching roller.By clamping action, from the composite construction of this lap sheet, do not broken by the fiber of the confining force of lap sheet 2 or holder (bite of this supply roller) maintenance at jaw.During this lock out operation, this fiber fringe 7 is by these top comb 9 additionally drawing-offs.This top comb has caused this taking-up in this situation the rearward end of fiber fringe is by combing and kept cotton knot, impurity and analog here.Because to the speed difference between 5 the take-off speed, thereby be provided with pair of separated roller 6 at this lap sheet 2 and this detaching roller, they comprise detaching roller 6a and pressure roller 6d similarly.Yet, implement actual lock out operation by first pair of detaching roller 5.During described lock out operation, rear end 8 stacked of the front end of fibre bundle separated or that be removed and this sliver 10 taken place or doubled.In case this lock out operation or bonding operation finish, then holder turns back in the rear positions, and holder is closed and will be from the fiber fringe 7 that wherein stretches out to the circle that is used for combing and combs 13 combing segment 12 in this rear positions.When clamp assemblies 1 turned back in its forward position, this detaching roller had been carried out counter motion to 5 and 6, so the rearward end 8 of this sliver 10 is returned the specific quantity of conveying.This is necessary so that obtain necessary overlapping for bonding operation subsequently.

Fig. 2 shows the detaching roller 5 with detaching roller 5a and pressure roller 5d of known type.This detaching roller 5a is rotatably installed on the frame MS of carding machine via the axle journal among the bearing LA shown in the letter.The driving of this detaching roller 5a and the driving of detaching roller 6a here do not illustrate, and are undertaken by the gear G that links to each other with driver AT (for example motor).As shown in the figure, this detaching roller 5a, 6a is driven via gear with the motion of pilgrim's paces.Be provided with pressure roller 5d on this detaching roller 5a, the detaching roller 5d that is installed in the unshowned recipient and in the operating position via axle journal is positioned on this detaching roller 5 with compressive load.This compressive load all is to be produced by Pneumatic pressure cylinder Z in each situation, and this pressure cylinder Z is installed in the unshowned recipient.This pressure roller 5a, the embodiment of the installation of 6a or the pressure cylinder Z in recipient can for example obtain in DE-A1-42294448.

Sliver 10 is clamped among the clamping line KL between this detaching roller 5a and the pressure roller 5d.

This Pneumatic pressure cylinder Z is connected on the pressure source Q by corresponding line 14 and 15 via valve V during operation, and is compressed air effect.Carry out the control of this valve V by control module ST, ST has also activated driver AT via this control module.

By being directed to pressure roll 5d, in the zone of the outer end of 6d and by the pressure roller 5d of correspondence, the pressure that the length of 6d causes, produced the bending force on the pressure roller, because this bending force causes this pressure roller crooked on its length, as by the deformation program among the rotating shaft DA in the position of use DA ' mark simple show.This bending has produced the pressure distribution that is applied to the pressure P on the sliver, and this can see from the curve shown in the pressure roller 5d.Can draw thus: this pressure P 1 is bigger at the borderline region of sliver 10, and less at the Pm place because of the distortion of pressure roller in this zone line in the compressive load on the sliver.

Therefore produced following effect: the borderline region R of this sliver 10 is out of shape undesirably because of main there top load (P1).The result of this effect shows that the borderline region of this sliver is inhomogeneous and unholiness.This has caused visually uneven sliver and can cause quality loss (irregularity) in the sliver that forms subsequently.

In order to take out above-mentioned defective, for example proposed a scheme: it is illustrated among Fig. 3.Except the design of the variation of this detaching roller 5a, remaining element is corresponding to the element that has been illustrated in the embodiment of Fig. 2.Therefore these parts are described no longer in the embodiments of figure 3.This detaching roller 5a and unshowned detaching roller 5a are provided with two tapered segment K1s adjacent with cylinder mid portion M, K2 two ends in each situation.

In order to compensate the bending force that on pressure roll, takes place, this mid portion M and the one the second circular cone K1, the length of K2 is different.This cylinder mid portion M has bigger length L 1 in this situation.But the length of this tapered segment K1 of adjacency is less than the length L 1 of this mid portion M greater than the length L 3 of the circular cone K2 of adjacency with it with it.

As what can draw especially from the amplifier section view of Fig. 4, this first circular cone K1 has the conicity angles alpha less than the taper angle β of this second outer conical K2.In this situation, conicity angles alpha can be 0 ° 2 '-0 ° 10 ', and taper angle β can be designed as 0 ° 12 '-0 ° 25 '.

According to the design of detaching roller 5a of the present invention (6a), the bending that takes place in this pressure roller 5d (6d) can roughly be compensated, as the curve on the pressure roller of Fig. 3 can draw.Power P2 in this situation in the borderline region R of this sliver 10 is non-significantly greater than the pressure P m in zone line, and therefore the above-mentioned shortcoming in the embodiment of Fig. 2 has been remedied.That is, the bending that takes place after the special heating during operation in pressure roller 5d is compensated by the shape of detaching roller 5a.Respective design by circular cone K1 and K2 obtains be in borderline region power P2 in addition less than pressure P m.

As can be drawn from Figure 4, this detaching roller 5a (6a) is provided with cannelure K, and this cannelure K can tilt to extend with the angled x of rotating shaft D of this detaching roller relatively.The partial view of the sectional view from Fig. 4 a can draw this cannelure and have degree of depth KT.For the constant centrifugation on the length overall L that remains on this detaching roller 5a (6a), can keep this cannelure degree of depth KT even in circular cone K1 and K2, be constant size.Although this is a slightly more complicated for production, on the right length overall of detaching roller, given above-mentioned constant centrifugation.

According to circular cone K1, the conicity angles alpha of K2, the size of β, also design causes this cannelure from this intermediate cylindrical part M, with parallel interval, extends on the length overall L of this detaching roller 5a.In this situation, this cannelure degree of depth will reduce in the zone of K2 along the direction of the end of this detaching roller at this circular cone K1.Because it is less relatively that corresponding taper angle keeps, reducing less relatively and can be left in the basket on this cannelure degree of depth.

Fig. 5 shows another embodiment that is similar to Fig. 3, but difference is: replace two outer conical on the mid portion M of detaching roller in each situation, be provided with 3 circular cone K1, K2, K3 on each side of this mid portion M.In this situation, correspondingly length L 1-L4 reduces gradually out to the respective end of this detaching roller 5a (6a).Conicity angles alpha, β, δ are designed to be increased to circular cone K3 from this circular cone K1 similarly.The taper angle δ that is used for circular cone K3 does not have shown in Figure 5 so that more clear, but can see and the angle α shown in Fig. 4 the corresponding angle of β as.

Although 3 circular cone K1-K3 shown here to be installed in the production aspect comparatively complicated, the shape of this detaching roller can accurately be adjusted according to the sweep of corresponding pressure roller undoubtedly.In other words, the pressure P in borderline region R 3 is roughly corresponding to the pressure P m in this zone line M or even can be lower.

In order further to make pressure in this borderline region R equal pressure P m in this zone line, can adopt following scheme: on each side of this intermediate cylindrical part M, have 6 circular cones.Yet, in this case, must between the benefit of reality and the productive expenditure, make decisions.

Fig. 6 shows another and improves, and wherein detaching roller 5a is designed corresponding to the improvement of Fig. 3.Different with this is that the design of pressure roller 5e is different from pressure roller 5d.This pressure roller 5e comprises the sleeve 20 (it for example is provided with rubber coatings) in the zone line that is installed in core 21 here.This core 21 is fastened on the axle 22, and 22 pressure roller 5e are installed in the corresponding unshowned receiving element by this axle.In this improves, in the zone line of this detaching roller, introduced pressure P, so the bending of this pressure roller 5e in borderline region R be lowered, and with the outer cone K1 of this detaching roller, the K2 combination has obtained roughly consistent pressure (chucking power) on the length L of this detaching roller.

In addition, in the example of Fig. 7, show a kind of improvement: this detaching roller 5a is provided with two circular cone K1, K2 similarly on two sides of this mid portion M.The pressure roller 5h that cooperates with this detaching roller 5a has two the circular cone K5s adjacent with the mid portion 25 of cylinder in each situation, they are tapered towards the end of this pressure roller.Connected axle journal 26 in the end regions of this pressure roller 5h each, pressure roller 5h has been installed in the receiving element by this axle journal 26, not shown.Be provided with two tapered segment K1 at two ends, during the detaching roller 5a of K2 cooperates, the circular cone K5 that is arranged among this pressure roller 5d can cause the compressive load P5 of the increase in the borderline region of sliver 10 additionally to reduce, thereby pressure distribution is roughly identical on this fibroreticulate whole width.

Fig. 8 shows the partial view of the amplification of detaching roller 5a, the circumferential surface U1-U4 of this tapered segment K1-K4 middle M1 along the direction of detaching roller 5a from this detaching roller 5a in each situation is provided with close to each otherly, extend in sweep BL, this sweep BL is calculated by following formula:

$w\left(x\right)=\frac{{\mathrm{<figure-callout\; id="4"\; label="ql"\; filenames="S2007101993882E00021.png"\; state="\{\{state\}\}">ql</figure-callout>}}^4}{24E{I}_y}[\frac{x}{l}-2{\left(\frac{x}{l}\right)}^3+{\left(\frac{x}{l}\right)}^4].$

In this improves, column part is not set.In other words, this detaching roller 5a is tapered towards its end on two sides the front portion of M1 therebetween equably.Show ground as institute's letter, this detaching roller also can be provided with longitudinal fluting K, shown in the example of Fig. 4 and institute's description like that.The explanation of the value of formula was carried out in front.Certainly, this improves and also can be provided with cylinder mid portion (not shown).

Not shown many improvement in the design of this pressure roller that can cooperate with detaching roller of the present invention all are possible.Yet the objective of the invention is, if can, keep the cylindrical shape of this pressure roller, so that guarantee the grinding more simply of pressure roller in cotton mill.Since the detaching roller that provides according to design of the present invention, can take out the pressure peak in the borderline region, and can reduce the wearing and tearing of roller, so be increased its service life.In addition, can also increase the quantity in combing cycle, wearing and tearing simultaneously can not be increased to a degree of not expecting.

Claims (13)

1. detaching roller (the 5a of a carding machine, 6a), on this detaching roller, be provided with pressure roller (5d, 6d), this pressure roller is acted on by pressure apparatus (Z) at the place, two ends transverse to the rotating shaft (D) of detaching roller, it is characterized in that, (5a 6a) has the zone line (M) of cylinder to this detaching roller, and the end of adjacency all is provided with at least two continuous tapered segment (K1 in each situation with it in both sides, K2), and along this detaching roller (5a, the direction of respective end 6a) is seen, in each situation, the tapered segment of back (K2) have the tapered segment (K1) greater than the front tapering (α, β).

2. (5a, 6a), wherein, (5a, the end of closing on described column part (M) 6a) has 2-6 continuous tapered segment (K1-K6) to this detaching roller to detaching roller according to claim 1 in each situation.

Detaching roller 3. according to claim 2 (5a, 6a), wherein, the circumferential surface (U1-U4) of this continuous tapered segment (K1-K4) extends along the sweep (BL) that obtains from following formula:

$w\left(x\right)=\frac{{\mathrm{ql}}^4}{24E{I}_y}[\frac{x}{l}-2{\left(\frac{x}{l}\right)}^3+{\left(\frac{x}{l}\right)}^4].$

4. according to claim 1 or 2 described detaching roller (5a, 6a), wherein, the length (L1) of this column part (M) is greater than the length (L1) of first tapered segment (K1) of adjacency with it in each situation, another tapered segment (K2 subsequently, K3) length (L2, L3) in each situation less than the length (L1) of corresponding first tapered segment (K1).

5. detaching roller (5a according to claim 4,6a), wherein, in each situation, on two sides of mid portion (M), be provided with two tapered segments (K1, K2), this first tapered segment (K1) is directly in abutting connection with this column part (M), be provided with tapering with the angle (α) in 0 ° 2 '-0 ° 10 ' scope in each situation, second tapered segment (K2) subsequently has the tapering at the angle (β) in 0 ° of 12 '-0 ° of 25 ' scope.

6. (5a, 6a), wherein, (5a 6a) is provided with longitudinal fluting (K) to this detaching roller according to each described detaching roller among the claim 1-5.

7. (5a 6a), is characterized in that detaching roller according to claim 6, and (5a, (M, K1 K2) go up extension to this longitudinal fluting (K) for cylinder 6a) and tapered segment at this detaching roller.

8. (5a, 6a), wherein, (5a, (K2 K3) upward extends with the constant longitudinal fluting degree of depth (KT) all parts 6a) this longitudinal fluting (K) detaching roller according to claim 7 for M, K1 at this detaching roller.

9. (5a, 6a), wherein, this longitudinal fluting (K) is so that (5a, rotating shaft 6a) (D) (x) at angle extend with respect to detaching roller according to claim 7 or 8 described detaching rollers.

According to each described detaching roller among the claim 1-9 (5a, 6a), wherein, be positioned at detaching roller (5a, 6a) Shang Mian pressure roller (5d, 6d) be cylinder and be provided with covering (U), the hardness of this covering is lower than this detaching roller (5a, the hardness on surface 6a).

11. (5a, 6a), wherein, (5a, 6a) (5d 6d) looks along its length (Ld) and has the shape of stray circle post shapes the pressure roller on detaching roller according to claim 1 to be positioned at detaching roller.

12. detaching roller according to claim 1 (5a, 6a), wherein, be positioned at detaching roller (5a, 6a) the pressure roller on (5d, 6d) have mid portion be fastened to the axle (22) core (21) on cylindrical sleeves (20).

13. the detaching roller (5a of a carding machine, 6a), on this detaching roller, be provided with pressure roller (5d, 6d), this pressure roller is acted on by pressure apparatus (Z) at the place, two ends transverse to the rotating shaft (D) of detaching roller, it is characterized in that, this detaching roller (5a, 6a) be provided with at least two continuous tapered segment (K1 to its two ends from its middle zone (M1) beginning, K2), and along this detaching roller (5a, the direction of respective end 6a) is seen, in each situation, tapered segment (the K2 of back, K3 K4) has tapering greater than the tapered segment of front, and the circumferential surface (U1-U4) of this continuous tapered segment (K1-K4) extends along the sweep (BL) that obtains from following formula:

$w\left(x\right)=\frac{{\mathrm{ql}}^4}{24E{I}_y}[\frac{x}{l}-2{\left(\frac{x}{l}\right)}^3+{\left(\frac{x}{l}\right)}^4].$

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